桔皮仪dual测量中涂层和电泳漆层.ppt

Start Paint Appearance Uniform Quality App. influenced by... wsc Principle scanning 1 scanning 2 scanning 3 scanning 4 Profile + Filter L/S sample A + B Principle wscDOI App. infl. by DOI Substrate roughness wave-scan advanced 桔皮仪系列: 不仅是用于品质管理的仪器 优化材料/工艺 控制工艺参数 品质管理 一种解决问题的诊断工具 用于全面检查表面外观的缺陷 Today the wave-scan is the standard tool at all major car companies to quantify appearance. It is not only to quantify appearance, but also help understand and analyze the surface quality. Very important is the uniformity of the finish - the Harmony between the horizontal and vertical panels. Differences are especially obvious on models with panels having very tight fits to each other. . What influences appearance? a) Flow / Leveling properties of the coating b) Gloss / Brilliance / DOI of the surface Depending on structure size and brilliance the surface will look very different. A laser point light source illuminates the sample at a 60° angle and a detector measures the reflected light intensity. The instrument scans the surface and measures the reflected light intensity point by point. The optical profile of the surface is detected. At this point a low intensity is detected on the sensor... Sensor signal increases ... . High sensor signal. Mathematical filter functions are used to divide the optical profile into several wave-length ranges. The “classical“ ranges are: SW: 0.3 - 1.2 mm LW: 1.2 - 12 mm The wave-scan analyzes orange peel according to the structure size. In order to simulate the human eye’s resolution at various distances the measurement signal is devided into several ranges. new wave-scan DOI: Expanded measurement range: 0.1 mm – 30mm Higher resolution: 0.1 – 0.3 mm LW range divided into two ranges to obtain more detailed info. Note: In addition, LW and SW data are also obtained with original filter functions. The new wavelength ranges are: Wa 0,1 – 0,3 mm Wb